Regional Geoscience Solutions - Ingenix Group

FOCUS ON WESTERN SIBERIA:

Regional Geoscience Solutions

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FOCUS ON WESTERN SIBERIA

* In cooperation with partners

Object-oriented processing* and interpretation of seismic data targeted at Tyumen Formation (Fm).

In-house methodology for mapping and ranking facies objects formed in different settings

according to 3D seismic and log data. Proven interpretation solutions for working with numerous

3D surveys.

Analysis of field operation results in the context of seismic projects in order to verify the

consistency of conceptual geological models. Looking for sweet spots for development.

Current photos of depositional settings typical of the Tyumen Fm:

rivers, lakes, and debris cones of the lake, lacustrine-boggy alluvial plain

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HARD-TO-RECOVER RESERVES OF THE TYUMEN FORMATION

• 305 fields / 1155 accumulations

• 3 bln tons of remaining recoverable reserves

Fields with accumulations in Tyumen Fm

In-house methodology to explore the

paleochannel series of Tyumen Fm, which

is approved by the SRC Technical Advisory

Board

Geological models are confirmed by drilling

of new vertical and horizontal wells

Objectives: from seismic data processing to

recommendations on field development

8 projects completed

for the Tyumen Fm

Completed Tyumen Fm exploration projects

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OBJECT-ORIENTED PROCESSING OF SEISMIC DATA

SEISMIC PROCESSING

WITH INTERPRETATION SUPPORT

PROJECT 1

previous processing,

acquisition in 2000-2001new processing, 2018 Object-oriented processing

accompanied by interpretation

allows reaching a new game-

changing level of seismic images

using the available acquisition data

PROJECT 2

previous processing,

acquisition in 2005-2006new processing, 2018

Oil company savings

through cancellation of re-shooting:

PROJECT 1 $ 3.5 mln

PROJECT 2 $ 5.5 mln

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OBJECT-ORIENTED SEISMIC INTERPRETATION

GEOLOGICALLY REASONABLE RESULTS

WITHOUT WHOLE AREA SEISMIC DATA REPROCESSING

2009

2014

2018

2015

2013

S=1887 km2

185 wells

2015 – year of processing

Exploration maturity

Oil company savings

through cancellation of re-shooting and

total re-processing

> $ 32 mln

Fragment of RGB blended map

after frequency decomposition using data from 5 surveys

2015

2018 2013

2009

2014

Identification of

paleo-channel objects

Application of the state-of-the-art software, frequency

decomposition and RGB blending technology

and in-house approaches to the Tyumen Formation studies

allow obtaining additional geological information from 3D

surveys of the past years

(with a fold of 24-42)*

* For example, in the Project 1 only 130 km2 were reprocessed (acquisition of the years 2000-2001) of 1 887 km2

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OBJECT-ORIENTED

SEISMIC INTERPRETATION (2)

GETTING GEOLOGICALLY REASONABLE RESUTLS

USING 3D SEISMIC DATA

13.5 m

8.4 m

Riverbed Crevasse splay

Map of Acoustic Impedance

Seismic facies map

RGB-blended map

Mapping of facies zones and

objects using the combined

maps of seismic facies,

Acoustic Impedance

and RGB-blended maps

(5 cubes, 8 seismic surveys)

Facies identification

in wells

on the basis of

diagram shape

and core

Substantiation of wave pattern variations by

means of seismic modelling

Outer flood plain

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OBJECT-ORIENTED


IN-HOUSE METHODOLOGY OF PALEO-RIVERBEDS CLASSIFICATION INTO SANDY AND SHALED-OUT

J2-2 J2-1

RGB-blended maps Coherence map

Log data

Amplitude cube after SD, F=38 Hz

B

T

Wave pattern in vertical sections

Joint analysis of the coherence,

amplitude, RGB-blended images,

and seismic wave pattern in

vertical sections and log data

allows identifying long-lived

paleo-riverbeds (paleo-rivers)

going through all stages of their

development and shaled out in

the final stage.

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OBJECT-ORIENTED SEISMIC INTERPRETATION (4)

Regional information

Core data

Well logs character

Isochores, total thickness

maps

Seismic facies maps

RGB blended map

Seismic attribute maps,

including AI

Geomorphology of current

rivers, lakes, etc.

Scheme of J2 bed depositional environment

MAIN FOCUS ON BUILDING OF A REASONABLE GEOLOGICAL CONCEPT

Analysis and consolidation of information from microlevel (core) to

macrolevel (regional paleogeographic maps) allows creating schemes of

depositional environment with different depositional settings and objects

(lakes, bogs, channels, including those shaled-out), fans composed of

sand material, etc.

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OBJECT-ORIENTED


Structural framework

PHI-Perm functions for the

objects with better reservoir

quality and flood plain

Well Log Interpretation

Results

Scheme of reliability of

identified objects

Map of reservoir probability

Table containing full

description of objects

Heff predicted maps (in case

the relationships exist)

Polygons of facies objects at

depth (top/bottom)

Data for 3D geological modelling

PREPARING SEISMIC INFORMATION FOR 3D MODELING

Specially prepared data allow to keep all geological information during the

course of 3D modelling

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SEISMIC INTERPRETATION WITH ANALYSIS OF DEVELOPMENT

CHECK OF GEOLOGICAL CONCEPT CONSISTENCY

The results of field operation

analysis

Histograms of porosity and

permeability distribution over the

facies


with facies objects delineated

N

o

.

Qo cumul., thous tons

1 43.3

2 36.2

3 34.5

3 wells

(encountered paleo-channels)

of 28 provided 60% of

cumulative production

Analysis of well performance and analysis of reservoir properties

histograms in the conditions of different facies zones allows checking the

conceptual geological model for consistency

In the Project 1 the conclusion was drawn that maximum net thickness 12-18

metres is typical only for channel sediments; NTG 0.6-0.8; porosity 16-18%;

and increased oil production rates (up 10 45 t/d after frac operations).

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SEISMIC INTERPRETATION WITH ANALYSIS OF DEVELOPMENT (2)

PRODUCTION DATA ANALYSIS AND CAPACITY ASSESSMENT

Fragment of the scheme of J2 bed

depositional environment

Production wells

Analysis of well operation data

in different facies zones allows estimating the development

efficiency

In the Project 1, the following conclusions were drawn:

Development of lacustrine-boggy zones, inner floodland zones

is extremely inefficient: initial production rates 1 to 5 t/d; well

are working during first months; Qcum is less than 1 thousand

tons.

Development of separate channels using single wells is

inefficient: initial production rates up to 10 t/s; well are working

during first months; Qcum is less than 5 thousand tons.

Development of outer floodland zones, crevasse splays (total

Heff of individual streaks up to 10 m) is not very efficient; the

effect of injection is insignificant because of poor pressure

communication between the wells. Initial production rates are

up to 15 t/d; Qcum less than 5 thousand tons.

Development with Reservoir Pressure Maintenance in the

zone of paleochannels is the most efficient. Initial production

rates are up to 45 t/d; Qcum 30-40 thousand tons.

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SEISMIC INTERPRETATION WITH ANALYSIS OF DEVELOPMENT (3)

PRODUCTION DATA ANALYSIS AND CAPACITY ASSESSMENT

WOC


in J2 interval

Fragment of the scheme of

reservoir probabilityFACIES:

Sand cone (in lake)

Fragment of the scheme of J2 bed

depositional environment

Integrated analysis of geological and geophysical, and

production data on the basis of conceptual geological model

allows revealing the most promising objects to bring the hard-to-

recover reserves into development

In the Project 1, it the 3-line drilling was recommended for the promising facies

object (sand cone in lake), namely: 14 horizontal producers with borehole

length 500 m and line spacing 600 m + 12 deviated holes for water injection.

MSHF (20-30 tons per stage) is recommended in horizontal wells.

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A GEOLOGICAL MODEL WAS SUPPORTED BY NEW WELLS

NEW WELLS CONFIRM DIFFERENT FACIES ZONES

PROJECT 1FACIES:

riverbed. Well 1


with facies objects delineated

New exploration wells of the years 2017-2018

FACIES:

coastal-lacustrine Well 2

Two exploratory wells

confirmed two different

facies zones - channel fill

and coastal-lacustrine

Well 1 encountered paleo-

channel: Net pay

thickness=12.8 m;

PHI up to 18%; PERM up to

30 mD

1

2

New production wells of the years 2017-2018

Three wells encountered

lacustrine-boggy formations

with extremely thin reservoirs

(up to 1.5 m)

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A GEOLOGICAL MODEL WAS SUPPORTED BY NEW WELLS (2)

NEW WELLS CONFIRM CHANNEL FILL DEPOSITS

PROJECT 2 Accuracy of structural imaging

for J2 bed in two exploratory wells is -0.2 m and

+1 m.

New wells of the years 2017-2018

Two exploratory wells confirmed paleochannel

facies; Net Pay Thickness = 7 m and 9 m; PHI

= 17-18%

Total net reservoir thickness in the horizontal

drillhole – 612 m

and 773 m; Qoil > 150 m3/d

Actual path

of new well

in the predicted

geological model

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SOFTWARE WE USE

GEOLOGY AND DEVELOPMENT

Paradigm

SeisEarth XV, Explorer EM

Stratimagic, VoxelGeoVI

QSI, IFP Inversion, Geolog

Недра

Isoline 8.5

ffA

GeoTeric

IHS

KINGDOM Advanced PAKaged

SUITE Plus, 2d/3d PAK Advanced

KINGDOM Rock Solid Attributes,

AVOPAK, Colored Inversion

Schlumberger

Petrel

Techlog

NTC Amp

Solver

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NETWORKING

Regular participation in industrial eventsPublications

in industrial media

Participance

in professional communities

Annual Ingenix Group workshops

on cost engineering and geoscience

solutions

>50PARTICIPANTS

Experts

from the leading

oil and gas and

service

companies

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WHY IS INGENIX GROUP IS BETTER?

We have wealth of experience in oil and gas consulting.

There are more than hundred projects of different structure and complexity

behind our team

We solve integrated tasks of our customers by efforts of a single

multidisciplinary team within the framework of business continuity processes,

which accelerates services and increases their quality

We are in continuous advancing - we form a community of the industry

professionals around us

Ulitsa Bolshaya Tatarskaya, 9

Moscow, 115184

Phone: +7 (495) 783-00-09

www. ingenix-group.ru

Documents

Regional Geoscience Solutions - Ingenix Group